1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8384507685b38b155b04f6cb22a6fdcd8a229146a3e782480298201223d9ef. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2476485-65a3-4d84-bde1-10ac64ed947e.json and https://artists.proofprofile.net/proofs/artist/a2476485-65a3-4d84-bde1-10ac64ed947e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ed29d6794c826a68bab2b2c85d5fe62bd6ade571d2bc29bc9a7586e83faf3f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJW2496456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc49f8f59b39e349249640a82a4c262085f9d42cebf95b6ba83119f0ffb7256e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2415928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e6910c6ec1f43b513ff1d753ad13488ad9390a41a5a0ab092f07d1703da047. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:29:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2415936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee83131c636124cff59cee44546f4872a88fca1703d3ef26de54ed1fdf3fc80. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:05:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2564467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4897ad75d3b840532715290a75f9997f93c21f19d10aa9a517d1c5e9187c8507. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2564391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f3ac1375fa5aa5976626a095092a43a5bb931a84f6a2300f23208024a49a6e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2511328.